docker run -d --name node-exporter \
  --pid host --net host \
  -v /:/host:ro,rslave \
  docker.io/rancher/mirrored-prometheus-node-exporter:v1.8.2 \
  --path.rootfs=/host

# K8s DaemonSet 部署于每个节点
# Prometheus ServiceMonitor 自动 scrape

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: node-exporter
  namespace: monitoring
spec:
  selector:
    matchLabels:
      app: node-exporter
  template:
    metadata:
      labels:
        app: node-exporter
    spec:
      hostPID: true
      hostNetwork: true
      containers:
        - name: node-exporter
          image: docker.io/rancher/mirrored-prometheus-node-exporter:v1.8.2
          args: ["--path.rootfs=/host"]
          ports:
            - containerPort: 9100
          volumeMounts:
            - name: root
              mountPath: /host
              readOnly: true
      volumes:
        - name: root
          hostPath:
            path: /